Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d57d46499d4514…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 11:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba2dfb6074ade41d850bd3ead0e62517 SHA-1: 11e62d22d060c4f44add7304144d5110b8524dd9 SHA-256: e4d57d46499d4514af1cc38344e8db1f1132f24a65b1b7e46f3953a39b07fac4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, with one identified as a malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?utm_term=directions+to+key+lime+cove+locations
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/179598.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f9238bcf2df2.pdf
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/7769653.pdf
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/falurowulov.pdf
    • https://bevalapiwilidi.weebly.com/uploads/1/3/4/5/134587476/fizusaxivezezid_kokutomexozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tetofamuxulil/complete_ascii_code_table.pdf
    • https://uploads.strikinglycdn.com/files/0497a04b-9bae-4da0-bcbb-bc61f561ad0b/sym_50cc_scooter_manual.pdf
    • https://s3.amazonaws.com/mamibis/95252848464.pdf
    • https://s3.amazonaws.com/tuletivotarupu/yahoo_password_finder_free_download.pdf
    • https://s3.amazonaws.com/wunojipu/57942583223.pdf
    • https://s3.amazonaws.com/susonanezaj/kexora.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca53.bin
f71345109ac56b9611909d8050b04010445888e463b1d56c8f3aa0098c690841
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 5168 bytes
font_01_sfnt_off0000dbe9.bin
30e4812012c36b1ccfc181e3d06460ecfbb8d35cac1de0362b3e3ee79b3aa13b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE9 10800 bytes